25:52 (Y. Ali) Therefore listen not to the Unbelievers, but strive against them with the utmost strenuousness, with the (Qur’an).

9:73 (Y. Ali) O Prophet! strive hard against the unbelievers and the Hypocrites, and be firm against them. Their abode is Hell,- an evil refuge indeed.

16:125 (Y. Ali) Invite (all) to the Way of thy Lord with wisdom and beautiful preaching; and argue with them in ways that are best and most gracious: for thy Lord knoweth best, who have strayed from His Path, and who receive guidance.

“As a person was putting his foot in his stirrup, he asked the Prophet (sa) ‘What is of the highest form of striving (jihad)?’

He answered: ‘Telling the truth to a tyrant.’” Nisai 196

From Abu Sa’id al-Khudri ra : Rasulullah s.a.w said : “If one of you sees (something) bad, he should change it with his his hand; and if he is not capable of that, then with his tongue; and if he is not capable of that, then (he should detest) it with his heart; and that is the weakest faith”. ( Muslim )